> But the logic that "well, we don't have polio anymore, therefore the vaccine
> must been effective" is really not much logic.

> By the same logic, I can say that my air filter is keeping the sharks away.
> I've never seen a shark here in rural Michigan, so it must be working.

How long, if ever, has it been since there were sharks in rural Michigan?
Pretty sure it has been a whole lot longer, if ever, than polio was seen
there.

The reason you have not seen polio in rural Michigan is because it was
erradicated.  I have met people my parent's age and older who had it.  I
don't know any my age because we all got vaccinated.

Don't worry.  As the pool of vaccine and virus deniers grows, I am sure
polio will come back again someday... a lot sooner before sharks would.


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